WELL JET DEVICE

The inventive device comprises a jet pump (6) mounted on a pipe string and a packer (1). A through channel (12) with a sealing unit having a channel (22) for passing a logging cable (14) is made in the pump body. A check valve (16) is placed in a channel (10), which is used for supplying a medium pumped out from a well, at the input thereof in the lower part of the body (7). A guiding bush (17) with a movable rod (18), which is arranged therein parallel to the logging cable (14), is fixed to the body (7) under the valve (16). The top end of the rod (18) is positioned under the closing element (19) of the check valve (16) and a fork (20), over which the logging cable (14) is passed, is fastened to the lower end of the rod (18). The rod (18) is arranged in such a way that the closing element (19) can be pressed out from a seat and brought into contact with the fork (20) of the rod (18) while a downhole instrument (15) is lifted. The invention makes it possible to extend the functionality of the device by isolating the pipe string spaces above and under the jet pump when the downhole instrument is bellow the pump.